AI/ML Engineering

Company Description Who We Are Cint is a pioneer in research technology (ResTech). Our customers use the Cint platform to post questions and get answers from real people to build business strategies, confidently publish research, accurately measure the impact of digital advertising, and more. The Cint platform is built on a programmatic marketplace, which is the world's largest, with nearly 300 million respondents in over 150 countries who consent to sharing their opinions, motivations, and behaviours. We are feeding the world's curiosity! Job Description The Role We're hiring an AI/ML Engineer for our AI/ML team in Prague to work on the production ML and data science systems that power Cint's marketplace. These are data products that our research customers depend on every day, including: • Feasibility Prediction: given a set of survey requirements, how many people can we expect to complete the survey on our platform? • Dynamic Pricing: choose the optimal price for a survey to optimize KPIs. The role is broad in scope, with the chance to work across several established projects and to shape what ships next Qualifications What You'll Do: • Build and maintain production ML systems: Contribute to existing ML-based services, from training pipelines to production performance optimizations.  • Own services end-to-end: Design, build and maintain production services - from a PoC all the way to a functional cloud deployment.  • Partner with product and data science: Work with PMs, data scientists, and other engineers to translate research and business questions into shippable ML. • Understand the platform: To facilitate the above, you'll work in Databricks, AWS and other tooling to be able to analyze, understand and present the data, metrics and insights needed to help make the best decisions for the platform. • Contribute to the team's standards: Review not just code but the ML side of the work as well - evaluation standards, model documentation etc. • Leverage AI tooling: Use Claude Code and agentic programming tools to accelerate the boilerplate so you can focus on the modelling decisions that actually matter. What You Bring: • Excellent programming skills and proficiency in Python. Knowledge of Java is a plus. • Knowledge of traditional machine learning tools and techniques (e. g. support vector machines, gradient boosting) • An understanding of LLMs and their architecture, ideally with experience in fine-tuning, e.g. LoRA, distillation is a plus • Proficient in SQL, knowledge of Databricks is a plus • Familiarity with cloud technologies, e.g. AWS • Proven experience as an AI/ML Engineer • Outstanding problem-solving and analytical skills • Knowledge of maths, probability, statistics and algorithms • You like to push the limits of your knowledge every day • You own your conclusions and are comfortable presenting them and shaping outcomes Additional Information Working at Cint • Prague-First, Europe-Friendly: Our preferred base is Prague, alongside our existing AI/ML team. Remote work from Spain or the UK is also possible, as these are the markets where we have entities. • AI-Native Engineering: We're rolling out Claude Code and modern agentic tooling across engineering. You'll use it daily, not as a novelty, but as a force multiplier for the complex problems that matter. • High Autonomy: We trust our engineers to make sound decisions and own their work end-to-end. • Global Impact: Your work powers a marketplace used by millions of people worldwide. • Modern Tech Stack: We usually build our services using the latest Python tooling and FastAPI, dockerize them and deploy with CI/CD to K8s in AWS. We keep the code on GitHub. • Company Hardware: Cint provides a laptop (Win/Linux/Mac) and accessories, and a height adjustable desk at the Pankrác office • Benefits Include:  • Office in Prague (Pankrác) but full remote possible • 25 days of vacation, unlimited sick days • Pension fund contribution, Edenred meal vouchers #LI-JM1 #LI-Remote Our Values Collaboration is our superpower • We uncover rich perspectives across the world • Success happens together • We deliver across borders. Innovation is in our blood • We're pioneers in our industry • Our curiosity is insatiable • We bring the best ideas to life. We do what we say • We're accountable for our work and actions • Excellence comes as standard • We're open, honest and kind, always. We are caring • We learn from each other's experiences • Stop and listen; every opinion matters • We embrace diversity, equity and inclusion. More About Cint We're proud to be recognised in Newsweek's 2025 Global Top 100 Most Loved Workplaces®, reflecting our commitment to a culture of trust, respect, and employee growth. In June 2021, Cint acquired Berlin-based GapFish – the world's largest ISO certified online panel community in the DACH region – and in January 2022, completed the acquisition of US-